/Engine/Plugins/Experimental/Mutable/Source/CustomizableObject/Classes/MuCO/CustomizableObjectInstance.h
Finds in ProjectorParameters a parameter with name ParamName, returns the index if found, -1 otherwise.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=CustomizableObjectInstance) int32 FindProjectorParameterNameIndex ( const [FString](API\Runtime\Core\Containers\FString) & ParamName ) const